Re: [Boost-bugs] [Boost C++ Libraries] #4022: dynamic_bitset compiler issue

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4022: dynamic_bitset compiler issue
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-03-21 05:09:43

#4022: dynamic_bitset compiler issue
---------------------------+------------------------------------------------
  Reporter:  anonymous     |       Owner:  gennaro_prota 
      Type:  Bugs          |      Status:  reopened      
 Milestone:  Boost 1.43.0  |   Component:  dynamic_bitset
   Version:  Boost 1.38.0  |    Severity:  Problem       
Resolution:                |    Keywords:                
---------------------------+------------------------------------------------

Comment(by steven_watanabe):

 Of course, you have to use an unsigned type.  With that the code does
 compile, although it emits a warning.  The warning is harmless in this
 case, although it would be better to fix it as you suggest.


 {{{
 #include <boost/dynamic_bitset/dynamic_bitset.hpp>

 int main() {
     boost::dynamic_bitset<unsigned long long> bitset_type;
     bitset_type.resize(10, false);
 }
 }}}

 {{{
 boost/dynamic_bitset/dynamic_bitset.hpp(673) : warning C4244:
 'initializing' : conversion from 'unsigned __int64' to 'const
 boost::dynamic_bitset<Block>::size_type', possible loss of data
         with
         [
             Block=unsigned __int64
         ]
         boost/dynamic_bitset/dynamic_bitset.hpp(649) : while compiling
 class template member function 'void
 boost::dynamic_bitset<Block>::resize(boost::dynamic_bitset<Block>::size_type,bool)'
         with
         [
             Block=unsigned __int64
         ]
         .\scratch.cpp(4) : see reference to class template instantiation
 'boost::dynamic_bitset<Block>' being compiled
         with
         [
             Block=unsigned __int64
         ]
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4022#comment:4>
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